The failsafe activity were infrequently used while confusing users.
Replace it with an app shortcut on Android 7.1+ and a separate app on
earlier versions.
As the notification icon and text is set to black, ROMs like Samsung OneUI and themes that change notifications to have a dark background will have visibility issues with Termux notifications. This commit sets a neutral color which will be visible on both white and dark backgrounds.
AndroidRuntime: FATAL EXCEPTION: main
AndroidRuntime: Process: com.termux, PID: 15799
AndroidRuntime: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean android.widget.ToggleButton.isPressed()' on a null object reference
AndroidRuntime: at com.termux.app.ExtraKeysView.readSpecialButton(ExtraKeysView.java:119)
AndroidRuntime: at com.termux.app.TermuxViewClient.readControlKey(TermuxViewClient.java:116)
AndroidRuntime: at com.termux.view.TerminalView.inputCodePoint(TerminalView.java:655)
AndroidRuntime: at com.termux.view.TerminalView$2.sendTextToTerminal(TerminalView.java:336)
AndroidRuntime: at com.termux.view.TerminalView$2.commitText(TerminalView.java:273)
AndroidRuntime: at com.android.internal.view.IInputConnectionWrapper.executeMessage(IInputConnectionWrapper.java:341)
AndroidRuntime: at com.android.internal.view.IInputConnectionWrapper$MyHandler.handleMessage(IInputConnectionWrapper.java:85)
AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:105)
AndroidRuntime: at android.os.Looper.loop(Looper.java:164)
AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:6944)
AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method)
AndroidRuntime: at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)
Also enables session autoclosing so no more "annoying" messages
about "process completed - press enter". There autoclosing will be
performed on exit codes '0' and '130'.
On Android TV devices old behaviour will be used - auto close enabled for all
sessions when amount of running sessions >1.
Commit f0eeb47 introduced configurable extra keys and thus changed the
height of the viewpager to be multipled by the number of rows of extra
keys. However, the extra keys had two rows at the time, so the initial
height should have been changed to half of what it was now that it is
multiplied. This was not done, so the viewpager was twice the height it
should be after that change.
